Around the twelfth and thirteenth century CE Angkor was thought to be one of the world's biggest cities. Its massive temple complex at Angkor Wat covered hundreds of acres adorned with majestic towers, terraces and waterways: symbols of the might of the Khmer kings who ruled the region. Angkor Wat attracts millions of tourists every year and has pride of place on the Cambodian national flag but there's much more to Angkor and the Khmer civilisation than its temples. Bridget Kendall talks about Khmer history with David Chandler, Emeritus Professor of history at Monash University in Melbourne; architectural historian Dr. Swati Chemburkar from the Jnanapravaha Arts Centre in Mumbai; anthropologist Dr. Kyle Latinis from the Institute of Southeast Asian Studies in Singapore and former Dean of the University of Cambodia; and art historian Dr. Peter Sharrock from the School of Oriental and African Studies in London. Photo: Angkor Wat temple complex. (SERENA/Gamma-Rapho via Getty Images)